Only write bastion ssh config when needed (#1810)
Only write bastion ssh config when needed (#1810)

This will allow running Kubespray when the user who runs it doesn't
have write permissions to the Kubespray dir, at least when not using
bastion.
Atoms/kubespray,kubernetes-incubator/kubespray,kubespray/kargo,kubespray/kargo,kubernetes-sigs/kubespray,Atoms/kubespray,kubernetes-sigs/kubespray,Abdelsalam-Abbas/kubespray_fork,kubernetes-incubator/kubespray,insequent/kargo,insequent/kargo,kubernetes-incubator/kargo,kubernetes-sigs/kubespray,sgm-media/kargo,Atoms/kubespray,kubernetes-sigs/kubespray,sgm-media/kargo,Abdelsalam-Abbas/kubespray_fork,Atoms/kubespray,kubernetes-incubator/kargo